TORQUE LIMITING THREADED FASTENER AND METHOD OF USE

• US 20190323538A1
• Filed: 04/12/2019
• Published: 10/24/2019
• Est. Priority Date: 04/24/2018
• Status: Abandoned Application

• Current Assignee: Coty D. Link
• Original Assignee: Coty D. Link
• Inventors: Link, Coty D.
• Application Number:
  US16/382,691
• Publication Number:
  US 20190323538A1
• Time in Patent Office: Days
• CPC Class Codes: F16B 23/0061 with grooves, notches or splines on the external peripheral surface designed for tools engaging in radial direction F16B23/003 takes precedence
• CPC Class Codes: F16B 31/02 for indicating the attainment of a particular tensile load or limiting tensile load apparatus for, or method of, determining value of torque or twisting moment for tightening a nut or other member similarly stressed G01L5/24
• CPC Class Codes: F16B 37/00 Nuts or like thread-engaging members specially shaped for rotations by a tool F16B23/00
• CPC Class Codes: F16B 37/044 Nut cages

Abstract

A torque-limiting threaded fastener including a specially designed set of bolts and nuts outfitted with a unique anterior and interior configuration of retractable, gripping teeth components structured and arranged to provide an easy means of preventing stripped bolts while also improving torque load on the bolts.

Claims

1. A torque limiting threaded fastener, comprising:

a bolt with external threads;

an inside collar with internal threads that threadably receive the external threads of the bolt, the inside collar including a plurality of external protrusions;

an outside collar that receives that inside collar, the outside collar including a plurality of internal protrusions,

wherein when the bolt is rotated a predetermined torque amount, the plurality of external protrusions of the inside collar slip past the plurality of internal protrusions of outside collar, limiting torque and prevent stripping in the torque limiting threaded fastener.

2. The torque limiting threaded fastener of claim 1, wherein the outside collar includes elastic material that compresses when the bolt is rotated a predetermined torque amount so that that the plurality of external protrusions of the inside collar slip past the plurality of internal protrusions of outside collar.

3. The torque limiting threaded fastener of claim 2, wherein the elastic material of the outside collar is cylindrical and circumferentially surrounds the plurality of internal protrusions of the outside collar.

4. The torque limiting threaded fastener of claim 1, wherein the plurality of external protrusions of the inside collar are at least one of serrations and triangles.

5. The torque limiting threaded fastener of claim 1, wherein the plurality of external protrusions of the inside collar includes rows of external protrusions that extend a longitudinal length of an exterior of the inside collar.

6. The torque limiting threaded fastener of claim 5, wherein the rows of external protrusions extend an entire circumference of the exterior of the inside collar.

7. The torque limiting threaded fastener of claim 1, wherein the plurality of internal protrusions of the outside collar are at least one of serrations and triangles.

8. The torque limiting threaded fastener of claim 1, wherein the plurality of internal protrusions of the outside collar includes rows of internal protrusions that extend a longitudinal length of an interior of the outside collar.

9. The torque limiting threaded fastener of claim 8, wherein the rows of internal protrusions extend an entire circumference of the interior of the outside collar.

10. A method of using the torque limiting threaded fastener of claim 1, comprising:

disposing the inside collar into the outside collar;

rotating the bolt so that the internal threads of the inside collar threadably receive the external threads of the bolt, causing the bolt to screw into the inside collar;

upon rotation of the bolt a predetermined torque amount, the plurality of external protrusions of the inside collar slipping past the plurality of internal protrusions of outside collar, limiting torque and prevent stripping in the torque limiting threaded fastener.

11. The method of claim 10, wherein the outside collar includes elastic material that compresses when the bolt is rotated a predetermined torque amount so that that the plurality of external protrusions of the inside collar slip past the plurality of internal protrusions of outside collar.

12. The method of claim 11, wherein the elastic material of the outside collar is cylindrical and circumferentially surrounds the plurality of internal protrusions of the outside collar.

13. The method of claim 10, wherein the plurality of external protrusions of the inside collar are at least one of serrations and triangles.

14. The method of claim 10, wherein the plurality of external protrusions of the inside collar includes rows of external protrusions that extend a longitudinal length of an exterior of the inside collar.

15. The method of claim 14, wherein the rows of external protrusions extend an entire circumference of the exterior of the inside collar.

16. The method of claim 10, wherein the plurality of internal protrusions of the outside collar are at least one of serrations and triangles.

17. The method of claim 10, wherein the plurality of internal protrusions of the outside collar includes rows of internal protrusions that extend a longitudinal length of an interior of the outside collar.

18. The method of claim 17, wherein the rows of internal protrusions extend an entire circumference of the interior of the outside collar.